November 2006 Board Meeting

President Stacy Edwards called the meeting to order at 6:05 p.m.

Old Business:

Stacy recapped that at the last business meeting we decided on a lease agreement and modest fee for observatory use and also installing a security gate in the front building to separate the telescope storage area from the bathroom area.

New Business:

Allen Lee has offered to donate money toward the purchase of a new storage building to house our tools, lawn mower, and gasoline away from the East Observatory. He has done some research and found acceptable steel buildings and a model from Rubbermaid. The steel building would require a foundation of some sort so there would be cost after the initial purchase while the Rubbermaid has its own foundation and should set up quickly.

Stacy brought up the idea of adding a PayPal link to the website for dues payment and, hopefully, spontaneous donation. We discussed the pros and cons – hopefully members would be quicker to pay their dues versus the fees incurred. David Reynolds mentioned that Amazon has a similar service and that we might add a link to that as well. He also had the idea of adding book suggestions to the site. If, for example, we recommend a book and a web site visitor makes the purchase through our link then we will make a modest commission.

No immediate decisions were made on the two topics above but it decided to do some research and then have the board vote on them outside of an official meeting. Both need to be decided on before the end of the year.

A proposal was made to make the CAAS property non-smoking and this was passed. Someone will purchase and post some signs.

Wade Van Arsdale asked about leasing the East Observatory. He is willing to give a 30 day notice to let someone else step forward if they would like it first. He is considering building a platform around the pier to make the building more practical for scopes other than long refractors.

The meeting was adjourned at 6:50.

Submitted by Jim Dixon.

Focusing & Hexagonal Masks

By Jim Dixon

When I first heard about these “quick focus” devices, I had no idea of their size and thought they were knobs that replaced the normal focusing knobs. After all, a larger knob would allow you finer control over focusing. When I realized they were aperture masks, I thought “yeah”. These sell for $47 or more depending on your telescope’s size although admittedly they double as a lens cap.
I wasn’t willing to spend that $50 on something that I had my doubts about. I purchased a sheet of foam core board from a hobby shop for $4 and made one that, to my amazement, actually works. The three holes form three images when the telescope is out of focus. As you close in on focus, they merge. As you can see from the picture, it doesn’t have to be very well made either.

One night I was trying to observe Sirius B, the much fainter white dwarf companion to Sirius. The difficulty in this is the closeness of the pair and the 9 or 10-magnitude difference. I heard about using a hexagonal mask to redirect the light from the bright into six spikes rather than one bright circle. I used some of the same foam core board left over from the focusing mask. It really does work. Light from the bright companion is channeled down the spikes allowing you to see objects closer to the bright companion.

Vibration Suppression Pads

By Jim Dixon
In recent years, several vendors have started selling vibration suppression pads that consist of multiple layers of different elastic materials. Typically, these sell for about $50. I decided to save $45 and make my own. At a local hardware store, I reviewed their selection of “couch coasters” and found some old style brown rubber coasters that would fit perfectly inside some hard plastic coasters that they also had. I initially tried placing felt pads between them but that turned out to be too soft. Then I tried silicon glue. It took a few days for the glue to dry since there was limited air available but the pads are working very well. I can’t compare them to the name brand pads as I’ve never tried those but in my opinion these do fine.